-roots



BLUWER,

Specification oi Letters IPs-.tent No. 30,157; detect To all whom it may concern: 'Y f A Be it ltnown that I, i). H. Roors, of. Connersrillc, in the county of Fayetteand/State of Indiana, have invented a new andiseful Improvement in Rotaryv 'lloncrsz and I do hereby declare that the following is a full, clear, and emu-,t description of the sanie ret'- erence being' had lo `tl accompanying drawings, foriiiino a parl' of Vthis specilication. in \\'liich- Figure l. 'represents la side' View', and Fig. 2. a central Veititail section.

Similar letters of reference, in each of the several figures, indicate corresi'ionding parts. The nature of my invention Vconsists in tlie combination Ywith two pistons which form arcs o't circles and each inclose one quarter the circumference of a given circle, of two recesses which forni quadrants of true circles, when each of' said recesses occupivv just one quarter of the circumference of the said given circle, as hereinafter described. By this combination of pistons and recesses constructedas described but tour small essential points of contact during the revolution of the. pistons are experienced, and therefore at 'these points, narrow packing' strips can availal'ily lie employed for rendering the pistons air-tight, duringI the tinntliat the y'acnnni is lieingvfornled, and these come into pla;7 periodically 'and successively or at the uionient when one ceases its Contact another supplies its place.

It is a ver)l essential thing to have the points of positive contact located, for the machine when first made.y if employed as a rotar)T pump can he run for some time without packing` and when the parts hare'worii so not to be sntliciently tight, the points ot' contact can he restored and the. machine rendered as tight', as when irst used. and thus the loss and expense, attending theconstruction of newA pistons or the bringing Vo't the parts closer together, obviated. In tlii's `particular, my machine (litters from all others that ein familiar with and especially from David M. `Walker-s pump, patented in 1835, whereas, with the combination of pistons and recesses constructed as`Mr. David M. Walker describes in` the patent granted to him in 1835 on a hydrant pnnip,

thc points of Contact are continually changing, 'while the piston is making its move- Inient through the curved recess and therefore it is impossible to availablyV employ he. used e senti iev 'mila/ri openings, both of which may he Iother packing is to be inserted in at the points w, ze, said. points bei .ones o't` 'pos ciiced. during the revointion strips of Y ein poiir this nein 'liine certainly co" i .f a i lii .re.r nt lin order to l chine ot' this character operaie for the. liiowin i air-tight. tot' k tight, the eii'eetiv; anni lost. to ay l bet Ween the a lin. tint-nts To enable others, malte and use my to describe its constrl tl c' A, and B..V represent two double noting rotating abntinents inode alike inail respects.

C, C, are their shafts.

D, D. D, D, are pistons wlii alike.

E, E, E, l, are the recesses which receive the pistons and all alii-te.

F, F. is a concave or cese extending around so justto clear the pist-ons they revolve.

H, and G, are tl e induction and olii-icl. erge cli all size adaptedfto the risesY to wh: chine is to be applied.

The pistons l), D, D, E. E, E, E, are arcs of ci tes and. have one common radins, which rediris is the chord an arc of one-eighth the circniniferi e of the circle on which they formed, shown by the dotted circie in 2.

The abiitnientsfi., and E, are to' ire- \olve simultaneously by ineens ot' two equal cog Wheels J, il', noon the shagls C, tl, o the abntnients. as seen in ilig. i. n order have the part-s operate very tiggtlj, the case oic a blower, suitable metalli" tive cont-eet which are tie a'niitments.

' TWhen very dense niels ere eperatetl, it will loe desirableto reni-ove so noli of each of the pistons as represented. in red ai ii- .roo

yas will allowtlie :tree escape of the finies as the pistons enter the recesses. The saine arrangement will be useful to* high veloci'les, im when the lnids are not Verf; densepor when a dei seinitl is suddenly forced tn ot 'the recess, fa conc ssion the result similar to .striking upon e. soliti substance, whereas hy allowing a. sntlieient outlet, all such concnslio device will act as a blower or pump.

ing, that the operation is easy.

, f, as a blower machine of operating size is run at a velocity of 300 or 400 revolutions per minute, a distinct sound can be heard as the air is forced from the recesses, in a blower, it will therefore be useful, as considerable motive power would be Saved thereby.

The operation is as follows: When the pistons are made to revolvel in the direction of the arrows, the Aair or. water or whatever y fluid is acted upon, will be carried forward as the pistons approach together, and is forced through thedischarge pipe G, and as the pistons till the recesses there can be no backward escapement. In this. manner, the

It is evident that by reversing the operation and acting upon the pistons by steam or water, the device becomes a rotary steam engine or a ressure Water wheel.

As the perlpheries of all the internal parts are in perfect circles, either convex or concave, it will be comparatively easy to construct them with accuracy.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination of the pistons D, D, and recesses E, E, Whenfso constructedas to presont but four essential points, of positive Contact as described and4 for the purposes set forth.

l. H. ROOTS. l 

